Wagon-jack



(No Model.)4 n

S. S. JOY.

WAGON JAGK.

No. 578,519. Patented Mar. 9,1897.

er. l (/@Hnesses 7 I lnvenffr UNITED STATES PATENT OFFICE.

SAM S. JOY, OF NEW MARKET, NEW HAMPSHIRE.`

WAGON-JAC K.

SPECIFIGATIONforming partof Letters Patent No. 578,519, dated March 9,1897.

Application iiled August 18, 1896. Serial No. 603,115. (No model.)`

i of the United States, residing at New Market,

in the county of Rockingham and State of New Hampshire, have inventedcertain new and useful Improvements in Wagon-Jacks; and I do herebydeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in theY art to which itappertains to make and use the same.

The essential as well as novel feature of this invention is theadjustable leverage,

whereby a heavy load may be raised as easily as one of a lesser weight,which will be fully set forth in the following specification and claims,and clearly illustrated in the drawings accompanying and forming a partof the same, of which- Figure l is an elevation of my improved jack.Fig. 2 is a longitudinal sectional elevation showing one end of thelevers which connect the step-piece with the lifting mechanism andshowing the shifting device, Fig. 3 being a detached sectional view ofthe shifting device, Figs. 4 and 5 being, respectively, a longitudinalsection and an end view of a detail of said shifting device. Fig. 6 is aperspective view showing the lower end of the step-piece with itsmalleable-iron cap-piece. Fig. 7 is a detail perspective view showingthat end of the connecting-rod which attaches to the shifting mechanismof the adjustable lever. Fig. 8 is a perspective view showing thecasting by which the connecting-rod is attached to the shiftingmechanism of the lever. Similar reference-letters denote correspondingparts.

A is a base-plate. Bis the standard; C, the adjustable step-piece; D,the operating-lever; E, a bar connecting the lever D (to which it isattached by a link F) and the lever G, which connects the lower ends ofthe steppiece C and the bar E with the standard B. These parts, with theexception of the lever G, may all be similar to those shown anddescribed in a United States patent. issued to myself, dated September18, 1894, and numbered 526,153; but this lever G in the present instanceis considerably longer than in the patent above mentioned and islikewise formed in two parts, each section of which is otally attachedto the standard at The opposite end of each section of the lever G isprovided with the slot g, the adjacent surfaces of each slot beingwidened or grooved, as at g', for the entire length of said slots, andthese are provided with depressions g2, one near each end of said slots,as shown in Fig. 2.

'zlahe shifting mechanism comprises a casting, which may be made toresemble two connected cylindrical portions H H', the former beingshorter than the latter, both being provided with longitudinal openingsh h', as shown best in Figs. 4 and 5. The part H of this casting is ofproper length to admit the yoke portion between its ends and the twosections of the lever G of the casting E', connected to the lower end ofthe bar E, and is connected to the lever G by a bolt I, which passesthrough the elongated openings g of the lever, perforations e4, formedfor the pur- -pose in the yoke of the casting E, and through theperforation hof said part H, said bolt'being provided with a threadednut fi at one end, I

as shown.

The part H is sufficiently long to rest in the grooves g of the lever G,and its perforation h contains studs J, which protrude through theelongated openings g of the lever G and are provided with a shoulder j,fitting the grooves g2 of said lever.

The studs J may be provided in their adjacent ends with sockets j toreceive opposite ends of a helical spring L7"@ for forcing the saidstuds outward or normally holding their shoulders j in the grooves g2 ofthe lever and thus firmly secure and pivotally connect the bar E ateither point on the lever G which may be required. To shift from one toanother, it is only necessary to depress the studs IOO J, which freestheir shoulders j from the grooves g2 of the lever G, into which saidshoulders will automatically return by the action of the spring 3'2.

The bar E is slotted at its lower end, as at e, and the casting E has acentrally-located vertical web e', which is driven into the slot e ofsaid bar and rigidly Jfastened therein by a suitable pin or rivet passedthrough the perforations e2 of the bar and e3 of the casting. Flangese5, formed at opposite sides of the casting E', are provided to preventany tendency in the end of said bar E to split.

Having described my improvements, what I claim isl. In a wagon -jack ofthe construction shown, comprising a suitable standard, an adjustablestep-piece, and an operating-lever, a lever pivoted at a point betweenits ends to the standard and pivotally connected at one end to theadjustable step-piece, and a bar attached at one end to theoperating-lever and adjustably connected at its opposite end to saidpivoted lever, said .connection being capable of adjustment toward oraway from the pivotal point of said lever, substantially for-the purposeset forth.

2. In a wagon-jack, the combination with the adjustable step-piece andoperating-lever of a metal cap iitting the lower end of the adjustablesiepepiece and perforated on opposite sides, a step-adjusting levercomposed of two sections and carrying at one end an adjustableconnection for the operating-lever, and a bolt or rivet passing throughsaid perforated cap and step-piece and serving the purpose of a pivotalconnection for one end of the step-adjusting lever, with the steppiece.

3. As a means of varying the leverage of wagon-jacks, a suitablestandard, a lever consisting of two parallel members pivotally connectedbetween its ends and at opposite sides of the standard one end of saidlever being pivotally attached to an adjustable step-piece and the otherend of each member being provided with an elongated opening havinggrooves on their adjacent sides and depressions near each end, asuitable casting fitting the said groove and provided withspringactuated studs passing through said elongated openings and havingeach a shoulder iitting the said depressions, the said adjustablestep-piece, an operating-lever, and a bar pivotally attached at one endto said casting and at the other to said operating-lever.

In testimony whereof I affix my signature in presence of two witnesses.Y

SAM S. JOY.

Witnesses:

J. B. THURsToN, JOHN H. ANDREWS.

